-1=-1/2a+9

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Solution for -1=-1/2a+9 equation: 



-1=-1/2a+9

We move all terms to the left:

-1-(-1/2a+9)=0



Domain of the equation: 2a+9)!=0

a∈R



We get rid of parentheses

1/2a-9-1=0

We multiply all the terms by the denominator


-9*2a-1*2a+1=0

Wy multiply elements

-18a-2a+1=0

We add all the numbers together, and all the variables

-20a+1=0

We move all terms containing a to the left, all other terms to the right

-20a=-1

a=-1/-20

a=1/20

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